There are 3 possible interpretations of the boy-Felthorne conversation. One is taking it at face value, one is thinking of it with Felthorne as the boy and Snape as the girl, and one is having Snape in the role of the boy and Lily in the role of the girl. Snape was using the face value conversation as a front for talking about the third one, but Felthorne misrepresented it as the second one, and once Snape realized that (presumably by using legilimency, since he catches Felthorne’s gaze) he made it clear that it wasn’t the case (though he did hint that he was really talking about himself by mentioning that the “boy” in question was in her potions class).
The boy in the face value conversation probably doesn’t exist, since there would be no point bringing him to Felthorne’s attention minutes before she is going to be obliviated (and it would be too much of a coincidence to have three real life situations correspond to each other instead of just two).
There are 3 possible interpretations of the boy-Felthorne conversation. One is taking it at face value, one is thinking of it with Felthorne as the boy and Snape as the girl, and one is having Snape in the role of the boy and Lily in the role of the girl. Snape was using the face value conversation as a front for talking about the third one, but Felthorne misrepresented it as the second one, and once Snape realized that (presumably by using legilimency, since he catches Felthorne’s gaze) he made it clear that it wasn’t the case (though he did hint that he was really talking about himself by mentioning that the “boy” in question was in her potions class).
The boy in the face value conversation probably doesn’t exist, since there would be no point bringing him to Felthorne’s attention minutes before she is going to be obliviated (and it would be too much of a coincidence to have three real life situations correspond to each other instead of just two).
I missed that one! Now it all makes sense.